package main

import "fmt"

var m map[string]string = map[string]string{
	"a": "aa",
	"b": "bb",
	"c": "cc",
}

func main() {
	fmt.Println(m["a"])
	delete(m, "a")
	delete(m, "aa")

	fmt.Printf("%v,len=%d \n", m, len(m))
	for k, v := range m {
		fmt.Printf("k=%s,v=%s \n", k, v)
	}
}
